72597139 has 4 divisors (see below), whose sum is σ = 72647640. Its totient is φ = 72546640.

The previous prime is 72597127. The next prime is 72597149. The reversal of 72597139 is 93179527.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72597139 - 2²³ = 64208531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72597095 and 72597104.

It is not an unprimeable number, because it can be changed into a prime (72597149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23029 + ... + 25990.

It is an arithmetic number, because the mean of its divisors is an integer number (18161910).

Almost surely, 2^72597139 is an apocalyptic number.

72597139 is a deficient number, since it is larger than the sum of its proper divisors (50501).

72597139 is a wasteful number, since it uses less digits than its factorization.

72597139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50500.

The product of its digits is 119070, while the sum is 43.

The square root of 72597139 is about 8520.3954720424. The cubic root of 72597139 is about 417.1636915411.

The spelling of 72597139 in words is "seventy-two million, five hundred ninety-seven thousand, one hundred thirty-nine".